[sql] Import reference version of SQLite 3.17..

third_party/sqlite/sqlite-src-3170000/ext/fts5/tool/fts5txt2db.tcl

+##########################################################################
+# 2016 Jan 27
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+proc process_cmdline {} { 
+  cmdline::process ::A $::argv {
+    {fts5                 "use fts5 (this is the default)"}
+    {fts4                 "use fts4"}
+    {colsize   "10 10 10" "list of column sizes"}
+    {tblname   "t1"       "table name to create"}
+    {detail    "full"     "Fts5 detail mode to use"}
+    {repeat    1          "Load each file this many times"}
+    {prefix    ""         "Fts prefix= option"}
+    {trans     1          "True to use a transaction"}
+    database
+    file...
+  } {
+  This script is designed to create fts4/5 tables with more than one column.
+  The -colsize option should be set to a Tcl list of integer values, one for
+  each column in the table. Each value is the number of tokens that will be
+  inserted into the column value for each row. For example, setting the -colsize
+  option to "5 10" creates an FTS table with 2 columns, with roughly 5 and 10
+  tokens per row in each, respectively.
+  
+  Each "FILE" argument should be a text file. The contents of these text files
+  is split on whitespace characters to form a list of tokens. The first N1
+  tokens are used for the first column of the first row, where N1 is the first
+  element of the -colsize list. The next N2 are used for the second column of
+  the first row, and so on. Rows are added to the table until the entire list
+  of tokens is exhausted.
+  }
+}
+
+###########################################################################
+###########################################################################
+# Command line options processor. This is generic code that can be copied
+# between scripts.
+#
+namespace eval cmdline {
+  proc cmdline_error {O E {msg ""}} {
+    if {$msg != ""} {
+      puts stderr "Error: $msg"
+      puts stderr ""
+    }
+  
+    set L [list]
+    foreach o $O {
+      if {[llength $o]==1} {
+        lappend L [string toupper $o]
+      }
+    }
+  
+    puts stderr "Usage: $::argv0 ?SWITCHES? $L"
+    puts stderr ""
+    puts stderr "Switches are:"
+    foreach o $O {
+      if {[llength $o]==3} {
+        foreach {a b c} $o {}
+        puts stderr [format "    -%-15s %s (default \"%s\")" "$a VAL" $c $b]
+      } elseif {[llength $o]==2} {
+        foreach {a b} $o {}
+        puts stderr [format "    -%-15s %s" $a $b]
+      }
+    }
+    puts stderr ""
+    puts stderr $E
+    exit -1
+  }
+  
+  proc process {avar lArgs O E} {
+    upvar $avar A
+    set zTrailing ""       ;# True if ... is present in $O
+    set lPosargs [list]
+  
+    # Populate A() with default values. Also, for each switch in the command
+    # line spec, set an entry in the idx() array as follows:
+    #
+    #  {tblname t1 "table name to use"}  
+    #      -> [set idx(-tblname) {tblname t1 "table name to use"}  
+    #
+    # For each position parameter, append its name to $lPosargs. If the ...
+    # specifier is present, set $zTrailing to the name of the prefix.
+    #
+    foreach o $O {
+      set nm [lindex $o 0]
+      set nArg [llength $o]
+      switch -- $nArg {
+        1 {
+          if {[string range $nm end-2 end]=="..."} {
+            set zTrailing [string range $nm 0 end-3]
+          } else {
+            lappend lPosargs $nm
+          }
+        }
+        2 {
+          set A($nm) 0
+          set idx(-$nm) $o
+        }
+        3 {
+          set A($nm) [lindex $o 1]
+          set idx(-$nm) $o
+        }
+        default {
+          error "Error in command line specification"
+        }
+      }
+    }
+  
+    # Set explicitly specified option values
+    #
+    set nArg [llength $lArgs]
+    for {set i 0} {$i < $nArg} {incr i} {
+      set opt [lindex $lArgs $i]
+      if {[string range $opt 0 0]!="-" || $opt=="--"} break
+      set c [array names idx "${opt}*"]
+      if {[llength $c]==0} { cmdline_error $O $E "Unrecognized option: $opt"}
+      if {[llength $c]>1}  { cmdline_error $O $E "Ambiguous option: $opt"}
+  
+      if {[llength $idx($c)]==3} {
+        if {$i==[llength $lArgs]-1} {
+          cmdline_error $O $E "Option requires argument: $c" 
+        }
+        incr i
+        set A([lindex $idx($c) 0]) [lindex $lArgs $i]
+      } else {
+        set A([lindex $idx($c) 0]) 1
+      }
+    }
+  
+    # Deal with position arguments.
+    #
+    set nPosarg [llength $lPosargs]
+    set nRem [expr $nArg - $i]
+    if {$nRem < $nPosarg || ($zTrailing=="" && $nRem > $nPosarg)} {
+      cmdline_error $O $E
+    }
+    for {set j 0} {$j < $nPosarg} {incr j} {
+      set A([lindex $lPosargs $j]) [lindex $lArgs [expr $j+$i]]
+    }
+    if {$zTrailing!=""} {
+      set A($zTrailing) [lrange $lArgs [expr $j+$i] end]
+    }
+  }
+} ;# namespace eval cmdline
+# End of command line options processor.
+###########################################################################
+###########################################################################
+
+process_cmdline
+
+# If -fts4 was specified, use fts4. Otherwise, fts5.
+if {$A(fts4)} {
+  set A(fts) fts4
+} else {
+  set A(fts) fts5
+}
+
+sqlite3 db $A(database)
+
+# Create the FTS table in the db. Return a list of the table columns.
+#
+proc create_table {} {
+  global A
+  set cols [list a b c d e f g h i j k l m n o p q r s t u v w x y z]
+
+  set nCol [llength $A(colsize)]
+  set cols [lrange $cols 0 [expr $nCol-1]]
+
+  set sql    "CREATE VIRTUAL TABLE IF NOT EXISTS $A(tblname) USING $A(fts) ("
+  append sql [join $cols ,]
+  if {$A(fts)=="fts5"} { append sql ",detail=$A(detail)" }
+  append sql ", prefix='$A(prefix)');"
+
+  db eval $sql
+  return $cols
+}
+
+# Return a list of tokens from the named file.
+#
+proc readfile {file} {
+  set fd [open $file]
+  set data [read $fd]
+  close $fd
+  split $data
+}
+
+proc repeat {L n} {
+  set res [list]
+  for {set i 0} {$i < $n} {incr i} {
+    set res [concat $res $L]
+  }
+  set res
+}
+
+
+# Load all the data into a big list of tokens.
+#
+set tokens [list]
+foreach f $A(file) {
+  set tokens [concat $tokens [repeat [readfile $f] $A(repeat)]]
+}
+
+set N [llength $tokens]
+set i 0
+set cols [create_table]
+set sql "INSERT INTO $A(tblname) VALUES(\$R([lindex $cols 0])"
+foreach c [lrange $cols 1 end] {
+  append sql ", \$R($c)"
+}
+append sql ")"
+
+if {$A(trans)} { db eval BEGIN }
+  while {$i < $N} {
+    foreach c $cols s $A(colsize) {
+      set R($c) [lrange $tokens $i [expr $i+$s-1]]
+      incr i $s
+    }
+    db eval $sql
+  }
+if {$A(trans)} { db eval COMMIT }
+
+
+